Form for concrete construction.



LOANN. FORM TON OONORTLTB OONSTRUOTTON.

APPLICATION FILED MAY 9,1908. 925 ,080. Patented June 15, 1909 2SHEETS-SHEET l.

J. GARR.

FORM FOR GONGRETE CONSTRUCTION. APPLIGATION FILED MAY 9,1908.

Panted- June 15, 1909.

2 SHEETS-SHEET 2.

Www/W' I mmlfvf" @am UNITED STATES PATENT FFICE.

JAMES CARR, OF CHICAGO, ILLINOIS.

FORM FOR CONCRETE CONSTRUCTION.

To all whom fit may concern:

Be it known that I, JAMEs CARR, a citizen of the United States, residingat Chicago, county of Cook, and State of Illinois, have invented certainnew and useful Improvements in Forms for Concrete Construction, of whichthe following is a specification.

My invention relates to molds for concrete construction, andparticularly to molds for constructing hollow concrete walls.

The object of my invention, is to provide a mold for constructing hollowor double concrete walls, having a solid foundation perforated atintervals with vertical drain openings extending from the space betweenthe sections of the wall to the bottom of the foundation, to prevent theaccumulation of moisture at the bottom of the air space.

A further object of my invention, is to provide a form or mold asmentioned, which shall be of simple construction and readily used.

Other objects will appear hereinafter.

My invention will be more readily understood by reference to theaccompanying drawings forming a part of this specification, and inwhich, l

Figure 1 is a vertical section of the portion of the mold used in theconstruction of the foundation, showing the foundation course completed,Fig. 2 is a similar view of the portion of the form used in theconstruction of the wall, illustrating two courses of the wallcompleted, and the form in position to receive the concrete or cementfor the third course, Fig. 3 is a detail perspective view of the coreused in the construction of the foundation, Fig. 4 is a perspective viewof the core used for constructing the wall, Fig. 5 is a view similar toFigs. 1 and 2, illustrating the form as arranged at the point where thebeams enter the wall, Fig. 6 is a perspective view of one of the formmembers such as used on the inner face of the wall between the beams,and Fig. 7 is a perspective view of one of the members for securing theform members mentioned, in place.

The mold comprises outer form walls suitably braced and cores for thehollow portions of the wall, and to form the drainage openings in thefoundation. The form walls comprise longitudinally or horizontallydisposed members 1, secured in place by the braces 2 of any ordinary orpreferred form. rThe foundation core which is covered in a copendingapplication comprises a longitudinal Specification of Letters Patent.

Application filed May 9, 1908.

Patented June 15, 1909.

Serial No. 431,848.

member 3 to which are secured at intervals, depending members 4. Themembers 4 are preferably formed of small tubes such as gaspipe, and arethreaded into the member 3, as indicated at 5 in Fig. 1. After thefoundation form walls 1 and the core are in position, the c oncrete isfilled in and tamped, forming a solid foundation 6A perforated atintervals by the vertical drain openings 7 extending from top to bottomof the foundation, and which carry off all moisture which wouldotherwise accumulate in the hollow superimposed wall, and permit themoisture thus drained off, to be absorbed by the ground. After thefoundation is sufficiently set, the core 3 4 is removed.

The foundation being completed, the Wall core is set in position abovethe row of openings 7, and the outer form members l are continued to orslightly above the height of said core, and the concrete lled in andtamped, forming the first course of the wall. The core comprises a pairof longitudinal members 9 and 10, a top member 11, and a plurality ofspacing members 12. rlhe members 9 and 10 are arranged parallel and arespaced apart by the interposed vertical members or blocks 12, and themember 11 rests upon the upper edges of the members 9 and 10, and closesthe opening between them intermediate of the members 12, the member 11being recessed as at 13 to receive the members 12 and permit the same toproject some distance above the same. The member 11 is secured to themember 9 as by the nails or screws 14, whereas the member is unattachedor loose from the remaining parts. The members 9 and 10 are preferably'tapered in cross section, the taper of the two members being equal, butopposite, that is, the broad edge of the member 9 is at the top, whilethe broad edge of the member 10 is at the bottom. I/Vith thisconstruction, the core presents the vertical and parallel outer faces15-15, and the diagonal or slightly inclined parallel inner faces 16-16against which the members 12 abut. By having the members 9 and 10tapered, the members 12 are normally inclined and when pulling thelatter upwardly to remove the form they will tend to assume a verticalposition thereby forcing the members 9 and l() slightly apart, making iteasier to remove the form. It will be seen by reference to Fig. 4 thatthe member 11 snugly closes the core at the top and prevents the cementor lIO concrete from dropping through and choking the drain openings 7.After the course is set the members 12 are withdrawn, and the corecollapsed, after which it may be readily removed without injuring thefreshly set concrete. Metal ties or bonds 17 are then placed atintervals upon the upper face of the course, bridging the same. The coreis then rested in position upon the bond 17 as illustrated in 1'iig'. 2,and the lower edges of l the members 9 and 10 are preferably notched asat 18, to receive the bonds, letting the lower edges 19 rest flush withthe upper edge of the last completed course.

2O indicate pins or lugs on the members 12, which rest upon the uppertace of the member 11, supporting the members 12 and preventing themfrom dropping through into the air space of the wall. It is obvious thatwhere the beams are inserted in the wall, the inner form members 1,cannot be continuous as they are at other points, but must be formed ofshort sections reaching from beam to beam.

21 indicates one of the sections. The sections are held in position bysmall brackets inserted between the adjacent underlying member 1 and thewall, and lugs or pin-s on the section engaging said. brackets. In Fig.7 I have illustrated one ofthe brackets which is formed of a singlestrip of metal bent to form the arms 22 and 23 at right angles to eachother. Then the last member 1 is positioned beneath the beams and theconcrete filled in, the arm 22 of the bracket is inserted between saidmember and the wall as shown in Fig. 5, the arm 23 resting upon androjecting beyond the upper edge of the mem er. Two of the brackets areinserted between each pair of beams. 24 indicates a beam. Secured to theouter face of the section 21 are a pair of irons 25 terminating in vins26 which extend downwardly below the ower edge of the section', andwhich engage apertures 27 formed in the arms 23 of the brackets. Thesections 21l are seldom as high as the beams, hence similar sections aresuperimposed upon the first and are secured in position in like manner,the vertical arm 22 of the bracket being inserted between the lowersection 21 and the adjacent portions of the wall` After the members 21reach the top of the beam, the members 1 are substituted and continuedupwardly until the position is reached where other beams are to besecured in the wall.

The air space 28 in the wall may be made of any width by varying thewidth of the core. rThis may be readily done by substituting wider ornarrower members 12 as it is desired to increase or decrease the size ofthe space.

Having described my invention what I claim as new, and desire to secureby Letters Patent, is:

1. A form -for constructing concrete walls comprising outer form walls,and a core, said core comprising a pair of parallel longitudinal membersarranged upon their edges, and equally and oppositely tapered, aplurality of spacing blocks arranged between said members and ahorizontal memberclosing the spaces between said longitudinal membersand between said spacing blocks, substantially as described.

2. In a form 'for constructing concrete walls, an inner 'form wallcomprising a plurality of horizontally disposed members arrangededgewise one upon the other and eX- tending upwardly to the iloor beams,short horizontally disposed members arranged above and upon the top ofthe last said members, and in the same plane therewith and means `forsecuring the same in position, said means comprising strap irons securedto the upper member and having downwardly eX- tending pins projectingbelow the lower edge of said member, and angle irons iXed to the innerface oi the member below and projecting outwardly over its upper edgeand pro vided with an eye in its end to receive said pin, substantiallyas described.

In testimony whereof l have signed my name to this specification in thepresence ol two subscribing witnesses.

JAMES CARR.

Titnesses JANET E. HOGAN, HOWARD S. AUSTIN.

